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No. 608,955. Patented Aug. 9, I898,

. F. A. DAVEY.

STEAM WHISTLE.

(Application filed June 1, 1 897.)

(No Model.)

UNJLTED STATES PATENT rricn.

FORIEST A. DAVEY, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO JOHN G.PATTERSON, OF SAME PLACE.

STEAM-WHISTLE.

SPECIFICATION forming part of Letters Patent No. 608,955, dated August9, 1898.

Application filed June 1, 1897. Serial No. 638,997. (No model.)

To all whom it may concern:

Be it known that I, FoRIEsr A. DAVEY, a citizen of the United States,residing at Detroit, in the county of WVayne and State of thepiston-valve H.

Michigan, have invented certain new and useful Improvements inSteam-lVhistles, of which the following is a specification, referencebeing had therein to the accompanying drawings.

It is the object of my invention to obtain. a device for operating awhistle which is simple in construction, certain in its operation, andis adapted to be operated from a distance.

The invention consists in the peculiar construction, arrangement, andcombination of parts, as more fully hereinafter described and claimed.

In the drawings, Figure 1 is a perspective view of my whistle-operatingdevice. Fig. 2 is a side elevation thereof. Fig. 3 is a vertical centralsection through the controllingvalve, and Fig. 4 is a plan view of themagnet.

A is the valve-casing, which has preferably integral therewith at itsupper end the lower cup B of the whistle.

O is the deflector-disk, having the screwthreaded nipple D, securing itto the casing, and the upward-extending shank E, to which the upper bellF ofthe whistle is secured.

The casing A is provided with the lateral extension G, within which isslidingly secured This preferably consists of a hollow cylindrical bodyportion a, having the enlarged end portion b, with the annular shoulderor valve-face 5 between, and the conical valve-face 0 formed atits smallend, adapted to engage with the valve seat d, formed around a port inthe partition e of the casing, said partition dividing the inlet passagef from the passage g, leading to the whistle. The enlarged end portionb'slides in a chamber h, communicating through the passage 2' with theinlet-passage f and by the branch passage j with an exhaust-port in thecasing, while the shoulder I) normally seats upon the seat I) in thecasing.

I is a double valve having the opposite con ical faces 70 and Z,adapted, respectively, to seat in the seats m and n and to control thepassages 2' and j.

the passage 2' to the chamber h.

mally to its seat.

0 is the stem ofthe valve passing out through the cap on which the seatat is formed and which has the exhaust-port q therein.

J is a lever pivotally secured to the casing and adapted to pressagainst the valve-stein o.

Kisa pipe connected to the lower end of the valve-casing; y

L is an electromagnet connected to the pipe K and preferably ofcylindrical form, having at its opposite end the heads 7', with theupwardly-projecting lugs s, forming the poles of the magnet, andlaterally-extending lugs 26, which are connected by a non-magneticcross-bar u, the latter being connected by the sleeve 0) to the pipe K.

M is an armature pivotallysecured to the non-magnetic arms 10, securedto the heads "1' and normally held slightly above the polepieces by thesprings x.

N is an arm projecting upward from the armature M, and P is a linkconnecting the arm N and the lever J.

O are binding-posts secured to but insu lated from'the cross-bar u, towhich the terminals of the magnet-coil are secured.

The lower end of the sleeve 1) is preferably screw-threaded and forms aunion or connection between the pipe K and the steam-pipe.

The parts being thus constructed, their operation is as follows: Steamadmitted through the pipe K enters the passage f and through I As thearea of the end 5 is larger than that of the valve end of the piston,the latter will be held nor- The magnetL is connected in an electriccircuit Q, which may extend to any distance desired from the whistle,and is provided with a suitable key or circuit-closer R. If now thecircuit is closed, the magnet will be energized, which will attract thearmature M and rock the arm N, the latter, through the medium of thelink P and lever J, moving the valve I, so as to close the passage i andopen the exhaust-passage. This will relieve the pressure from thechamber 7t and allow the pressure in the passage f to open the valve H,admitting steam to the whistle. The valve Iis so small that but verylittle power is required to operate it, while the arrangement of theelectromagnet and controlling-levers is such as to insure a positiveoperation of the valve whenever the circuit is closed. The valve IIbeing hollow is very light, and thus moves easily without danger ofinjuring the seats by striking too hard a blow.

What I claim as my invention is 1. In a whistle-valve, a mainsteam-valve, comprising a freely sliding piston, heads thereon ofdifferent area, seats around each head, seats in the casing againstwhich the seats on the pistons respectively bear, the main steam-passageto the whistle leading to and controlled by the smaller head, and anauxiliary valve-controlled passage leading to the larger head, having anexhaust therein.

2. In a Whistle-valve, a main steam-valve comprising a freelyslidingpiston, heads thereon of diiferent area, seats around each head,seats in the casing against which the seats on the piston respectivelybear, the main steam-passage to the whistle controlled by the smallerhead, an auxiliary passage from the steam-supply pipe to the largerhead, an exhaust-port therein, and a valve for controlling the supplyand exhaust port to the larger piston, said valve consisting of afreelysliding stem having oppositely arranged seats thereon at oppositeends and corresponding seats around the ports leading from the mainsteam-supply to the auxiliary passage and from the auxiliary passage,and

means for actuating said valves in both directions.

3. The combination with a main whistlevalve of the kind described, ofthe controlling-valve for the supply and exhaust to the large piston,consisting of the valve I having inclined seats at opposite endscontrolling respectively the supply and exhaust ports, the cap p havingthe exhaust-port therethrough and a seat on its inner end against whichthe valve I is adapted to engage, an actuating-stem for the valvepassing freely through the cap, said cap being detachable to permit ofthe removal of the valve I.

4. The combination with the Whistle, the

valve and pipe of an electromagnet secured to said pipe and comprising acylindrical body having the end heads 0" provided with the upuwardly-projecting pole-pieces s and the rearwardly-extending lugs t, theconnecting nonmagnetic cross-bar u secured. to the pipe and the hingedarmature M, and a connection 1 between said magnet and valve consistingof an upWardly-proj ecting arm on the armature, a lever on the valve anda link connecting said arm and lever.

In testimony whereof I affix my signature in presence of two witnesses.

FORIEST A. DAVEY. \Vitnesses:

M. B. ODoennnrv, O'rro F. BARTHEL.

